Wisconsin Gov. Scott Walker urges Wisconsin voters to support Sen. Ted Cruz in a new ad that calls Donald Trump’s closest competitor “the only conservative who can beat Hillary Clinton” and a Constitutional conservative candidate with a plan to “challenge the status quo” like Wisconsinites have.

Ted is a Constitutional conservative. He’ll challenge the status quo, just like we’ve done in Wisconsin.

And Ted has a real plan to grow jobs and restore opportunity.

On Tuesday, please join me in supporting Ted Cruz — the only conservative who can beat Hillary Clinton and reignite America’s promise.

Walker announced his endorsement of Cruz, frontrunner Donald Trump’s closest competitor, on Tuesday, just one week before his state’s April 5 primary election.

Walker suspended his campaign last year citing a desire to consolidate the Republican field and prevent Trump from securing his party’s nomination for president. “I encourage other Republican presidential candidates to consider [exiting] so that the voters can focus on a limited number of candidates who can offer a positive, conservative alternative to the current frontrunner,” Walker said upon exiting the race.

Gov. Walker garnered national attention during a standoff with unions in his state over making Wisconsin a right-to-work state. Walker has been marked in the past as appealing to a blue-collar, populist contingent. In a candidate forum last August, Walker said, “I’m pro-worker and pro-taxpayer. We gave workers the freedom to choose. We made Wisconsin a right-to-work state. We gave workers the freedom to choose whether they want to be in a labor union or not.”

“All candidates who are still in the race, candidates who have recently dropped out are obviously there — Gov. Perry and Gov. Walker both — have great records within their states and have every right to offer advice, but more than advice from any particular candidate or former candidate is going to be the laws of political reality,” Cruz Chief Strategist Jason Johnson told Breitbart News in September after Walker suspended his own campaign for the presidency.